mesosoma

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mesosoma
1. In invertebrates whose body is divided into sections (e.g. Lophophorata and Hemichordata), the ‘collar’ that lies between the protosoma and the metasoma.

2. In Hymenoptera, the combined thorax and first abdominal segment. See also GASTER; METASOMA; SCORPIONES.

3. See ENTEROPNEUSTA.

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mesosoma

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